Just to share, this is the space where I plan to add the flush sliding doors. (ignore the current wardrobe, plan to replace it built in wardrobe)
My plan is to have the sliding door flush with the walls so it looks like a false walls instead of a wardrobe.

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Julie from Hafele Malaysia have been very helpful on replying my inquires, will share more if I have more updates.

yes, going to replace current wardrobe with built in full height/width wardrobe. please share your false door renovation when its done. would love to learn in case in the future I wanted to do the same.

Can be done but easiest is bi-fold which can be airtight. They should have glass panels instead of cheap acrylic.